The core theme of the work is the sharp contrast between an individual’s external appearance and their internal reality. "In a place full of people" establishes a setting of forced sociability—a party, a workplace, or a busy street—where the expectation is to remain "composed."

: The "shaking" is internal—a "pocket of regret and revenge" or a festering anxiety that is pushed down to maintain a polite social facade. Vulnerability as a Quiet Rebellion

The phrase refers to a song or artistic work titled "Secretly Shaking," which explores the profound internal struggle of masking anxiety, trauma, or emotional distress in public settings. The "CND-201" prefix likely refers to a specific project code or catalog number associated with the creator.